Thimo Eichstaedt (abc@digithi.de) wrote:
> Hi folks,
>
The CPU does support powesaving, but does the BIOS?
Which motherboard do you have, and do you have powernow/cool'n'quiet
enabled in BIOS?
> I have an Athlon AMD 64 3000 MHz and want to use its powersaving
futures. Therefore I am using PowerNow with the powernow_k8 module.
This is working
> great.
> Additionally it should be possible to profit from the power
states of the processor (C1...C8). But the ACPI module tells me
that only C1 is availabe:
>
> Modules loaded: processor, powernow_k8, cpufreq_userspace
> dmesg output when loading processor.ko module:
> ...
> ACPI: CPU0 (power states: C1[C1])
> ...
>
> cat /proc/acpi/processor/CPU0/power:
> active state: C1
> max_cstate: C8
> bus master activity: 00000000
> states:
> *C1: type[C1] promotion[--] demotion[--]
latency[000] usage[03559864]
>
> cat /proc/acpi/processor/CPU0/throttling
> <not supported>
>
> Is this correct or what have I done wrong ? Can anybody with a
AMD64 processor perhaps post its proc output ?
>
> Thanks
> Thimo
>
>
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